Light emitting apparatus, electronic equipment and method of driving pixel circuit that suppress light emission

Abstract

A light emitting apparatus includes: a first transistor having a first end a second end, and a first control electrode; a light emitting device having a first electrode and a second electrode; a second transistor having a third end connected to the first end and a fourth end connected to the first electrode; a third transistor having a fifth end connected to the first electrode and a sixth end connected to an first power supply line; a fourth transistor having a seventh end connected to the first control electrode and a eighth end connected to the first end; a capacitive device which has a third electrode connected to first control electrode and a fourth electrode; and a fifth transistor having a ninth end connected to the fourth electrode and a tenth end connected to a data line.

What is claimed is: 
     
       1. An OLED apparatus comprising:
 a first transistor having a first end and a second end, and a first control electrode; 
 an organic light emitting diode having a first electrode and a second electrode; 
 a second transistor having a third end directly connected to the first end of the first transistor and a fourth end directly connected to the first electrode of the organic light emitting diode; 
 a third transistor having a fifth end directly connected to the first electrode of the organic light emitting diode and a sixth end directly connected to a first power supply line, wherein the first power supply line is different from a data line; 
 a fourth transistor having a seventh end directly connected to the first control electrode of the first transistor and a eighth end directly connected to the first end of the first transistor; 
 a capacitive device which has a third electrode directly connected to the first control electrode of the first transistor and a fourth electrode; and 
 a fifth transistor having a ninth end directly connected to the fourth electrode of the capacitive device and a tenth end directly connected to the data line, 
 wherein the eighth end of the fourth transistor is connected to the fifth end of the third transistor through the second transistor; and 
 wherein the third transistor is continuously turned on during an initialization period, a compensation period, a writing period and a discharge period, but is turned off during a light emission period. 
 
     
     
       2. The OLED apparatus according to  claim 1 , further comprising a sixth transistor having a eleventh end directly connected to the fourth electrode of the capacitive device and a twelfth end directly connected to a second power supply line. 
     
     
       3. Electronic equipment including the OLED apparatus according to  claim 2 . 
     
     
       4. The OLED apparatus according to  claim 1 , further comprising a third power supply line directly connected to the second electrode of the organic light emitting diode,
 a first potential being supplied to the third power supply line. 
 
     
     
       5. The OLED apparatus according to  claim 4 ,
 the first transistor being a P-channel type transistor. 
 
     
     
       6. The OLED apparatus according to  claim 5 , further comprising a fourth power supply line directly connected to the second end of the first transistor,
 a second potential higher than the first potential being supplied to the fourth power supply line. 
 
     
     
       7. Electronic equipment including the OLED apparatus according to  claim 6 . 
     
     
       8. Electronic equipment including the OLED apparatus according to  claim 5 . 
     
     
       9. The OLED apparatus according to  claim 4 ,
 a third potential of the first power supply line being lower than a potential which is higher than the first potential by a threshold voltage of the organic light emitting diode. 
 
     
     
       10. Electronic equipment including the OLED apparatus according to  claim 9 . 
     
     
       11. Electronic equipment including the OLED apparatus according to  claim 4 . 
     
     
       12. The OLED apparatus according to  claim 1 ,
 the second electrode of the organic light emitting diode being directly connected to the first power supply line. 
 
     
     
       13. Electronic equipment including the OLED apparatus according to  claim 12 . 
     
     
       14. The OLED apparatus according to  claim 1 ,
 the fourth transistor and the fifth transistor being the same conduction type transistor. 
 
     
     
       15. Electronic equipment including the OLED apparatus according to  claim 14 . 
     
     
       16. Electronic equipment including the OLED apparatus according to  claim 1 . 
     
     
       17. An OLED apparatus comprising a pixel circuit and a driving circuit which drives the pixel circuit,
 wherein the pixel circuit includes:
 a first transistor having a first end and a second end, and a first control electrode; 
 an organic light emitting diode having a first electrode and a second electrode; 
 a second transistor having a third end directly connected to the first end of the first transistor and a fourth end directly connected to the first electrode of the organic light emitting diode; 
 a third transistor having a fifth end directly connected to the first electrode of the organic light emitting diode and a sixth end directly connected to a first power supply line, wherein the first power supply line is different from a data line; 
 a fourth transistor having a seventh end directly connected to the first control electrode of the first transistor and a eighth end directly connected to the first end of the first transistor; 
 a capacitive device which has a third electrode directly connected to the first control electrode of the first transistor and a fourth electrode; and 
 a fifth transistor having a ninth end directly connected to the fourth electrode of the capacitive device and a tenth end directly connected to the data line, 
 wherein the eighth end of the fourth transistor is connected to the fifth end of the third transistor through the second transistor; and 
 wherein the third transistor is continuously turned on during an initialization period, a compensation period, a writing period and a discharge period, but is turned off during a light emission period. 
 
 
     
     
       18. Electronic equipment including the OLED apparatus according to  claim 17 . 
     
     
       19. An OLED apparatus comprising:
 a first transistor having a first end and a second end, and a first control electrode; 
 an organic light emitting diode having a first electrode and a second electrode; 
 a second transistor electrically connected between the first end of the first transistor and the first electrode of the organic light emitting diode; 
 a third transistor electrically connected between the first electrode of the organic light emitting diode and a first power supply line, wherein the first power supply line is different from a data line; 
 a fourth transistor electrically connected between the first control electrode of the first transistor and the first end of the first transistor; 
 a capacitive device which has a third electrode connected to the first control electrode of the first transistor and a fourth electrode; and 
 a fifth transistor electrically connected between the fourth electrode of the capacitive device and the data line, 
 the first electrode of the organic light emitting diode being directly connected to the second transistor and the third transistor, 
 wherein the fourth transistor is connected to the third transistor through the second transistor; and 
 wherein the third transistor is continuously turned on during an initialization period, a compensation period, a writing period and a discharge period, but is turned off during a light emission period. 
 
     
     
       20. Electronic equipment including the OLED apparatus according to  claim 19 .